In fact, when we usually make some old tea, we will find a thin layer of oil mist on it, similar to some um oil. In fact, these fogs should be professionally called tea or soup, not harmful substances.
There is always some oil floating on the tea soup. In fact, there are some fat-soluble substances in tea soup, such as some carotenoids and fatty acids, which have a delicate fragrance. Then a cup of fragrant milk tea will give off the flavor of these ingredients. These fat-soluble substances will naturally boil when they meet the temperature difference, so this is mainly because it has a lot of inclusions, not some oil.
The appearance of tea mash is not unique to some famous teas, but similar to that of tea mash as long as there are some ingredients, so it depends mainly on whether his tea contains inclusions. When tea without temperature meets water with temperature, it will naturally produce white fog, and the higher the temperature of water, the more white fog you will produce when making tea.
In fact, according to relevant reports, if there is more tea in a tea, it will taste better than the taste, and the aroma of tea will be heavier, so in fact, the oil floating on the tea soup is not harmful and can be used with confidence.